Question: What was Liège's twin city in 1955?
Paraphrase: In 1955, what was Liege's twin city?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q3992 p:P190 ?s . ?s ps:P190 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1955')) }